JP2024034935A - Anchor holding tool and grout filling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor holding tool and a grout filling method which can stably hold an anchor in a central part of a hole of an object.

SOLUTION: An anchor holding tool 10 includes: a grip collar 12 mounted in a hole wall 103 by expansion and contraction; a plug 14 having an insertion part 60 which is pushed into the grip collar 12 and has a truncated conical shape, and a base part 62 which is formed integrally with the insertion part 60 and faces the edge part of the hole 102, enlarging the diameter of the grip collar 12 by pushing the insertion part 60 into the grip collar 12, and fixing the grip collar 12 into the hole wall 103; a holding hole 30 which is formed in the central part of the plug 14 and centers an inserted anchor 18 to the central part of the hole 102; an insertion port 32 which is formed around the holding hole 30 of the plug 14 and into which a hose 20 for injecting a grout into the hole 102 is inserted; and an exhaust port 34 which is formed around the holding hole 30 of the plug 14 and exhausts air in the hole 102.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to an anchor holder and grout filling method.

Anchor construction methods have been proposed in the past. For example, the anchor construction method described in Patent Document 1 includes a drilling step of drilling a hole in the target object along the vertical direction, and a hole-drilling step in which a hole is drilled in the bottom of the hole of the target object at the tip of the main body of the anchor bar. The method includes an anchor fixing step of inserting the anchor portion and fixing the anchor muscle to the object, and a filler injection step of filling the hole of the object with a filler. In the fixing step, the formwork is attached to the anchor bars so as to close the holes in the object, thereby stabilizing the anchor bars relative to the object.

Japanese Patent Application Publication No. 2014-009455

In the anchor construction method described in Patent Document 1, a hole is drilled in the target object along the vertical direction, and the anchor bar is attached to a formwork placed on the upper surface around the hole of the target object. For this reason, for example, in a structure in which a hole is drilled horizontally in an object, it is not possible to place formwork on the vertical wall around the hole, and the position of the anchor reinforcement inside the hole in the object is It may shift.

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide an anchor holder and grout filling method that can stably hold an anchor in the center of a hole in an object.

The anchor holder according to the first aspect includes an annular body that expands and contracts and is installed in the hole wall, a truncated conical insertion part that is pushed into the annular body, and an edge of the hole that is integrally formed with the insertion part. a base part facing the hole wall, a plug that expands the diameter of the annular body by pushing the insertion part into the annular body and fixes it within the hole wall; a holding hole for centering the anchor in the center of the hole; an insertion port formed around the holding hole of the plug into which a hose for injecting grout into the hole can be inserted; and the holding hole for the plug. and an exhaust port formed around the hole to exhaust air within the hole.

According to the anchor holder according to the first aspect, with the annular body disposed within the hole wall, the truncated conical insertion portion of the plug is pushed into the annular body, and the base portion integrally formed with the insertion portion is inserted into the hole. face the edge of the The insertion portion of the plug expands the diameter of the annular body and fixes the annular body within the hole wall. By inserting the anchor into the holding hole formed in the center of the plug, the anchor is centered at the center of the hole. Therefore, the anchor can be stably held in the center of the hole.
The plug is equipped with an insertion port for grout injection and an exhaust port that exhausts air from the hole when grout is injected. , grouting work can be done easily.

The anchor holder according to the second aspect includes: an annular body that is widened and installed in the hole wall of the hole; a contact portion that is disposed inside the hole and contacts one axial direction of the annular body; a tubular part formed integrally with the contact part and inserted into the annular body, into which an anchor is inserted, and a threaded part formed at the end; a plug that contacts the other and has the tubular portion inserted into the center hole; and a fixing member that is screwed into the threaded portion and pulls the contact portion back toward the plug to expand the diameter of the annular body. , an insertion part formed around the tubular part, the contact part and the central part of the plug into which a hose for injecting grout into the hole can be inserted; and a central part of the tubular part, the contact part and the plug. and an exhaust port formed around the hole to exhaust air within the hole.

According to the anchor holder according to the second aspect, the contact part, the annular body, and the tubular part are arranged inside the hole with the tubular part inserted into the annular body. After inserting the tubular part into the center hole of the plug, the fixing member is screwed into the threaded part at the end of the tubular part, and the contact part is pulled back toward the plug by screwing it in, expanding the annular body and opening the hole. Stick it inside the wall. By inserting the anchor into the tubular part, the anchor is centered in the hole. Therefore, the anchor can be stably held in the center of the hole.
The plug is equipped with an insertion part for grout injection and an exhaust port to exhaust air from the hole when grout is injected. , grouting work can be done easily.

The anchor holder according to the third aspect includes: an annular body that is widened and comes into close contact with the hole wall of the hole; a contact portion that is arranged inside the hole and contacts one axial direction of the annular body; The annular body is integrally formed with the contact part and the annular body is attached to the outer circumferential side, a circular hole in the center into which the anchor is inserted, a mounting part having a screw hole formed around the circular hole, and an attachment part on the outer surface of the hole. A plug that faces the annular body, contacts the other axial direction of the annular body, and has a center hole formed in the center thereof through which the anchor is inserted; and a plug that is screwed into the threaded hole and into a through hole formed in the plug. A bolt to be inserted, a nut that is screwed onto the bolt on the side of the plug and tightened to pull the mounting part back toward the plug side and expand the diameter of the annular body, and a center of the mounting part and the plug. an insertion part formed around the mounting part and into which a hose for injecting grout into the hole can be inserted; and an exhaust port formed around the mounting part and the center part of the plug to exhaust air from the hole. , has.

According to the anchor holder according to the third aspect, the annular body is mounted on the outer peripheral side of the mounting part, the bolt is screwed into the screw hole, and the bolt is inserted into the through hole of the plug. In this state, the mounting portion and the annular body are placed inside the hole. A nut is screwed onto the bolt on the side of the plug. Then, by tightening the nut, the mounting portion is pulled back toward the plug and the annular body is enlarged, thereby bringing the annular body into close contact with the inside of the hole wall. By inserting the anchor into the center hole of the plug and the circular hole of the mounting part, the anchor is centered at the center of the hole. Therefore, the anchor can be stably held in the center of the hole.
The plug is equipped with an insertion part for grout injection and an exhaust port to exhaust air from the hole when grout is injected. , grouting work can be done easily.

The grout filling method according to a fourth aspect includes the steps of: holding an anchor in the center of the hole using the anchor holder according to any one of the first to third aspects; The method includes the steps of injecting grout into the hole from a hose inserted into the hole and exhausting the air in the hole from the exhaust port, and removing the anchor holder after the grout has hardened.

According to the grout filling method described in the fourth aspect, the anchor is held in the center of the hole using the anchor holder. Grout is injected into the hole from the hose inserted into the anchor holder, and the air inside the hole is exhausted from the exhaust port. After the grout has hardened, the anchor holder is removed. Therefore, grout can be injected into the hole while the anchor is stably held in the center of the hole by the anchor holder.

According to the present disclosure, the anchor can be stably held at the center of the hole in the object.

It is an exploded side view showing an anchor holder of a 1st embodiment. (A) is a side view showing a state in which an anchor is held in a hole in a structure using the anchor holder of the first embodiment, and (B) is a side view showing a state in which the hole in the structure is filled with grout and hardened. FIG. (A) is a side view showing the grip collar of the anchor holder of the first embodiment, and (B) is a front view showing the grip collar. (A) is a side view showing a grip collar of a modified example, and (B) is a front view showing a grip collar of a modified example. (A) is a sectional view showing the plug of the anchor holder of the first embodiment, and (B) is a front view showing the plug. (A) is a sectional view showing a first example in which an anchor is inserted into a plug, and (B) is a front view showing a first example in which an anchor is inserted into a plug. (A) is a sectional view showing a second example in which an anchor is inserted into a plug, (B) is a front view showing a second example in which an anchor is inserted into a plug, and (C) is a cross-sectional view showing a second example in which an anchor is inserted into a plug. It is sectional drawing which shows the 3rd example which inserted. It is an exploded side view showing an anchor holder of a 2nd embodiment. It is a figure which shows the state which held the anchor in the hole of the structure using the anchor holder of 2nd Embodiment. (A) is a front view showing the insertion plug of the anchor holder of the second embodiment, (B) is a sectional view showing the insertion plug, and (C) is the anchor holder of the second embodiment. It is a front view showing an insertion plug, a plug body, and a wing nut. (A) is a perspective view showing a state in which an anchor is held in a hole of a structure using the anchor holder of the second embodiment; It is a perspective view showing a part of the state in which the anchor is held in the hole of the body in cross section. It is an exploded perspective view showing an anchor holder of a 3rd embodiment. (A) is a schematic configuration diagram showing a state in which an anchor is held in a hole in a structure using an anchor holder according to a third embodiment, and (B) is a schematic configuration diagram showing a state in which an anchor is held in a hole in a structure using an anchor holder. It is a partial sectional view showing a state in which the anchor is held.

Embodiments of the present invention will be described in detail based on the drawings. In each drawing, things that are less relevant to the present invention are omitted from illustration.

<First embodiment>
The anchor holder and grout filling method of the first embodiment will be described.

[Overall configuration of anchor holder]
FIG. 1 is an exploded side view showing the anchor holder 10 of the first embodiment, and FIG. 2(A) shows a state where the anchor 18 is held in the hole 102 of the structure 100 using the anchor holder 10. FIG.

As shown in FIGS. 1 and 2(A), the anchor holder 10 is a jig for holding the anchor 18 in the center of the hole 102 of the structure 100. The structure 100 is made of concrete, and holes 102 are formed in the vertical outer surface 101 of the structure 100 along the horizontal direction. The hole 102 of the structure 100 has a circular hole wall 103, and the inner diameter of the hole 102 is equal in the depth direction.

The anchor holder 10 includes a grip collar 12 as an example of an annular body, and a plug 14 that expands the diameter of the grip collar 12 and fixes it within the hole wall 103. Furthermore, the anchor holder 10 includes a plurality of (four in the first embodiment) bolts 16 that fix the plug 14 to the grip collar 12. Although not shown, a threaded portion is formed in at least a portion of the anchor 18 in the axial direction.

The plug 14 is provided with a holding hole 30 into which the anchor 18 is inserted, an insertion port 32 into which a hose 20 for injecting grout can be inserted, and an exhaust port 34 through which air within the hole 102 is exhausted. A hose 22 for exhausting air within the hole 102 is inserted into the exhaust port 34. Details of the plug 14 will be explained later.

(Grip color 12)
As shown in FIGS. 3-1(A) and 3-1(B), the grip collar 12 includes an annular main body portion 40. As shown in FIGS. A slit 42 is formed at one location in the circumferential direction of the main body 40 along a direction intersecting the circumferential direction of the main body 40 (in the first embodiment, a perpendicular direction). The main body portion 40 is cut at one location in the circumferential direction by a slit 42 . The main body portion 40 has a shape in which an outer diameter on one side in a direction perpendicular to the circumferential direction (axial direction) gradually becomes larger than an outer diameter on the other side. A plate-shaped extension 44 extending radially outward is provided at one axial edge (the edge having a larger outer diameter) of the main body 40 . As an example, four extension parts 44 are provided at intervals in the circumferential direction of the main body part 40. A threaded hole 45 into which the threaded portion 16A of the bolt 16 is screwed is formed in the extending portion 44.

A plurality of V-shaped notches 46 are formed on one axial edge of the main body 40, and a V-shaped notch 46 is formed on the other axial edge of the main body 40. A plurality of 47 are formed. The cutout portions 46 and the cutout portions 47 are arranged alternately along the circumferential direction of the main body portion 40. Note that instead of this configuration, a configuration may be used in which one or both of the notch portion 46 and the notch portion 47 are not provided. A plurality of slots 48 are formed on the outer peripheral surface of the main body portion 40 . The slot 48 is, for example, a rectangular frame or section, and projects radially outward from the outer peripheral surface of the main body 40 . The slot 48 may be a hole formed inside the frame.

As an example, two slots 48 are arranged between the notch part 46 and the notch part 47, and the two slots 48 are arranged between adjacent edges of the notch part 46 or the notch part 47. They are arranged approximately parallel to each other. The two slots 48 between the notch portion 46 and the notch portion 47 are arranged diagonally so as to intersect with the axial direction of the main body portion 40 . Further, the two slots 48 adjacent to the two slots 48 intersect with the extension line of the two slots 48 and intersect with the axial direction of the main body 40. are arranged in different diagonal directions. That is, the two slots 48 between the notch portion 46 and the notch portion 47 are arranged so that their directions alternate in the circumferential direction of the main body portion 40 .

The grip collar 12 can be expanded or contracted by providing a slit 42. By inserting the later-described insertion portion 60 of the plug 14 into the grip collar 12, the grip collar 12 expands and deforms (increases in diameter) following the shape of the hole 102 and the insertion portion 60. By expanding the diameter of the grip collar 12, the plurality of slots 48 come into close contact with the hole wall 103 (see FIG. 2), so that the plug 14 is fixed to the hole wall 103 by the frictional force generated on the hole wall 103. .

(Modified grip collar 52)
A grip collar 52 of a modified example is shown in FIGS. 3-2(A) and 3-2(B). Note that the same components as those of the grip collar 12 are given the same reference numerals, and explanations of the same components will be omitted.

The anchor holder 10 may use a modified grip collar 52 instead of the grip collar 12. As shown in FIGS. 3-2(A) and 3-2(B), the grip collar 52 has a claw protruding outward in the radial direction on the other axial edge (the edge with the smaller outer diameter) of the main body 40. It is equipped with 54. The claws 54 protrude from the outer peripheral surface of the main body 40 in an inverted V shape. A plurality of claws 54 are formed on the other edge of the main body 40 in the axial direction (a portion other than the notch 47).

In the grip collar 52 of the modified example, the diameter of the grip collar 52 is expanded by inserting the later-described insertion portion 60 of the plug 14, and the plurality of claws 54 are brought into close contact with the hole wall 103 (see FIG. 2). The grip collar 52 is fixed to the hole wall 103 by the frictional force generated on the hole wall 103.

(Plug 14)
As shown in FIGS. 4A and 4B, the plug 14 is a wedge-shaped plug, and includes a truncated conical insertion portion 60 and a base portion 62 integrally formed with the insertion portion 60. There is. The insertion portion 60 is smaller than the inner diameter of the hole 102 (see FIGS. 1 and 2) of the structure 100, and can be inserted into the hole 102. The insertion portion 60 has a circular outer peripheral surface whose outer diameter gradually decreases from the base portion 62 side toward the distal end portion 60A side. That is, the outer circumferential surface of the insertion portion 60 is inclined with respect to the axial direction when viewed from the side. The outer circumferential surface of the insertion portion 60 is formed along the inner circumferential surface inclined with respect to the axial direction of the grip collar 12 (see FIG. 3-1). In the first embodiment, the outer diameter of the insertion portion 60 is slightly larger than the inner diameter of the grip collar 12. Thereby, by pushing the insertion portion 60 into the grip collar 12, it is possible to expand the diameter of the grip collar 12.

The outer diameter of the base portion 62 is larger than the inner diameter of the hole 102 (see FIGS. 1 and 2) of the structure 100. As an example, the outer diameter of the base portion 62 is equal in the axial direction. When the insert portion 60 is pushed into the grip collar 12 and placed in the hole 102 of the structure 100, it is possible for the base portion 62 to face the edge (i.e., the outer surface 101) of the hole 102 of the structure 100 ( (See Figure 2).

The retaining hole 30 is formed in the center of the plug 14 as described above. The holding hole 30 is circular and passes through the insertion portion 60 and the base portion 62 in the axial direction. As shown in FIGS. 5(A) and 5(B), the anchor 18 is a cylindrical member. The inner diameter of the holding hole 30 of the plug 14 is approximately equal to the outer diameter D1 of the anchor 18, so that the anchor 18 can be inserted into the holding hole 30. The outer diameter D1 of the anchor 18 is, for example, 19 mm. In the first embodiment, the outer diameter D1 of the anchor 18 and the inner diameter of the holding hole 30 are set to dimensions such that the anchor 18 hardly shakes when the anchor 18 is inserted into the holding hole 30 of the plug 14. has been done. By fixing the plug 14 within the hole wall 103 via the grip collar 12, it is possible to center the anchor 18 inserted into the holding hole 30 of the plug 14 at the center of the hole 102 of the structure 100. It is.

As shown in FIGS. 4A and 4B, an insertion hole 32 is formed around the holding hole 30 of the plug 14. As shown in FIGS. The insertion opening 32 is circular and passes through the insertion portion 60 and the base portion 62 in the axial direction. A tubular hose 20 for injecting grout is inserted into the insertion port 32 .

An exhaust port 34 is formed around the holding hole 30 of the plug 14. The exhaust port 34 is circular and passes through the insertion portion 60 and the base portion 62 in the axial direction. A tubular hose 22 for removing air from the hole 102 of the structure 100 is inserted into the exhaust port 34 .

A plurality of through holes 66 are formed near the outer circumference of the base portion 62 of the plug 14, through which the threaded portion 16A of the bolt 16 passes. In the first embodiment, four through holes 66 are provided in accordance with the positions of the screw holes 45 of the extending portion 44 of the grip collar 12. As a result, the threaded portion 16A of the bolt 16 is passed through the through hole 66 of the plug 14, and the threaded portion 16A is screwed into the threaded hole 45 of the extension portion 44 of the grip collar 12 (see FIG. 2).

(Example of grout filling method)
Next, an example of a grout filling method using the anchor holder 10 will be described.

As shown in FIG. 1, the anchor 18 is inserted into the holding hole 30 of the plug 14, the hose 20 is inserted into the insertion port 32 of the plug 14, and the hose 22 is inserted into the exhaust port 34 of the plug 14.

Grip collar 12 is then placed within hole 102 of structure 100 .

Next, by pushing the insertion portion 60 of the plug 14 into the grip collar 12, the diameter of the grip collar 12 is expanded, and the base portion 62 of the plug 14 is made to face the edge (outer surface 101) of the hole 102 of the structure 100. Then, the threaded portion 16A of the bolt 16 is passed through the through hole 66 of the plug 14, and the threaded portion 16A is screwed into the threaded hole 45 of the grip collar 12. Thereby, as shown in FIG. 2, the plug 14 is fixed to the grip collar 12 with a plurality of bolts 16.

In this state, the grip collar 12 whose diameter has been expanded by the insertion portion 60 of the plug 14 is in close contact with the hole wall 103, and the plug 14 is fixed within the hole wall 103 via the grip collar 12. Therefore, the anchor 18 inserted into the holding hole 30 formed at the center of the plug 14 can be centered at the center of the hole 102 of the structure 100.

Thereafter, grout is injected from the hose 20 into the holes 102 of the structure 100. At this time, the air in the hole 102 is exhausted from the hose 22. By gradually pulling out the hose 22 from the plug 14 according to the amount of grout injected, the air in the hole 102 is smoothly exhausted from the hose 22.

Next, after the hose 20 is pulled out from the plug 14, leakage of grout from the end of the hose 20 is prevented. This completes the filling of the grout into the holes 102 of the structure 100.

After the grout has developed the required strength (eg, after the grout has aged for the required period), the bolts 16 are removed and the grip collar 12 and plug 14 are removed from the hole 102 in the structure 100. Thereby, as shown in FIG. 2(B), the anchor 18 is fixed laterally by the grout 110 filled in the hole 102 of the structure 100.

[Action and effect]
In the anchor holder 10, with the grip collar 12 disposed within the hole wall 103 of the structure 100, the truncated conical insertion portion 60 of the plug 14 is pushed into the grip collar 12, and the base formed integrally with the insertion portion 60 is inserted. The portion 62 faces the edge of the hole 102. The diameter of the grip collar 12 is expanded by the insertion portion 60 of the plug 14, and the grip collar 12 is fixed within the hole wall 103. By inserting the anchor 18 into the holding hole 30 formed in the center of the plug 14, the anchor 18 is centered in the center of the hole 102. Therefore, the anchor 18 can be stably held at the center of the hole 102 of the structure 100.

The plug 14 is provided with an insertion port 32 for grout injection and an exhaust port 34 for exhausting air from the hole 102 by injecting grout. Therefore, in the anchor holder 10, grout can be easily injected into the hole 102 from the hose 20 inserted into the insertion port 32.

The grout filling method also includes the step of holding the anchor 18 in the center of the hole 102 of the structure 100 using the anchor holder 10. The grout filling method includes the steps of injecting grout into the hole 102 from the hose 20 inserted into the plug 14 of the anchor holder 10 and exhausting the air in the hole 102 from the exhaust port 34. Further, the grout filling method includes a step of removing the anchor holder 10 after the grout has hardened.

Therefore, in the grout filling method, grout can be injected into the hole 102 while the anchor 18 is stably held in the center of the hole 102 of the structure 100 by the anchor holder 10. Furthermore, by removing the anchor holder 10 after the grout has hardened, the anchor 18 is fixed laterally by the grout 110 filled in the hole 102 of the structure 100, as shown in FIG. 2(B). . At this time, irregularities occur on the concrete surfaces of the grout 110 and the structure 100, and the shear strength at the joint surface is improved.

<Example when anchor diameters are different>
6(A) and 6(B) show an example in which the outer diameter of the anchor 70 is smaller than the inner diameter of the holding hole 30 of the plug 14. As shown in FIGS. 6(A) and 6(B), when the outer diameter D2 of the anchor 70 is smaller than the inner diameter of the holding hole 30 of the plug 14, the inner wall of the holding hole 30 of the plug 14 and the anchor 70 A wedge member 72 is inserted between the outer surface of the holder and the outer surface of the holder. The inner wall of the holding hole 30 is, for example, 19 mm, and the outer diameter D2 of the anchor 70 is, for example, 16 mm. The wedge member 72 is a wedge-shaped member made of rubber or sponge, for example, and can be flexibly deformed. The wedge member 72 can fill the gap between the inner wall of the holding hole 30 and the outer surface of the anchor 70.

FIG. 6C shows another example in which the outer diameter of the anchor 74 is smaller than the inner diameter of the holding hole 30 of the plug 14. As shown in FIG. 6(C), when the outer diameter D3 of the anchor 74 is smaller than the inner diameter of the holding hole 30 of the plug 14, there is a gap between the inner wall of the holding hole 30 of the plug 14 and the outer surface of the anchor 74. Insert the wedge member 76 into. The outer diameter D3 of the anchor 74 is, for example, 13 m, and the thickness of the wedge member 76 is thicker than the thickness of the wedge member 72. The material of the wedge member 76 is the same as that of the wedge member 72. The wedge member 76 can fill the gap between the inner wall of the holding hole 30 and the outer surface of the anchor 74.

<Second embodiment>
Next, the anchor holder and grout filling method of the second embodiment will be described using FIGS. 7 to 10. Note that the same components as those in the first embodiment described above are given the same numbers and the description thereof will be omitted.

[Overall configuration of anchor holder]
As shown in FIGS. 7 to 10, the anchor holder 120 includes a tight material 122 as an example of an annular body, an insertion plug 124 having a contact portion 130 (to be described later) that contacts one of the tight materials 122, and a tight material 122. and a plug body 126 that contacts the other side of the plug body 126. Further, the anchor holder 120 includes a wing nut 128 that is threaded into a threaded portion 134 of the insertion plug 124, which will be described later. Plug body 126 is an example of a plug. Wing nut 128 is an example of a fixing member.

(insertion plug 124)
The insertion plug 124 includes a contact portion 130 disposed inside the hole 102 of the structure 100, and a tubular portion 132 integrally formed with the contact portion 130 (see FIGS. 9A and 9B). )reference). The contact portion 130 is an annular plate-shaped body, and the outer diameter of the contact portion 130 is smaller than the inner diameter of the hole 102. The outer diameter of the tubular portion 132 is smaller than the outer diameter of the contact portion 130, and a radially inner end of the contact portion 130 is connected to the tubular portion 132. The inner diameter of the tubular portion 132 is approximately equal along the axial direction. The contact portion 130 contacts one side of the tight material 122 in the axial direction inside the hole 102 of the structure 100 (see FIG. 8).

The outer diameter of the tubular portion 132 is slightly smaller than the inner diameter of the tight material 122, and the tubular portion 132 can be inserted into the tight material 122. Further, the inner diameter of the tubular portion 132 is larger than the outer diameter of the anchor 18, and the anchor 18 is inserted into the tubular portion 132. A threaded portion 134 into which a wing nut 128 can be screwed is formed on the outer peripheral surface of the end of the tubular portion 132 (the end opposite to the contact portion 130) (see FIGS. 7 and 9(B)). .

The contact portion 130 is provided with an insertion port 136 into which the hose 20 for injecting grout can be inserted, and an exhaust port 138 for exhausting air within the hole 102 (see FIG. 9(A)). The insertion port 136 is an example of an insertion portion. The insertion port 136 and the exhaust port 138 are formed around a center hole in the contact portion 130 that is connected to the tubular portion 132 . A hose 22 for exhausting air within the hole 102 is inserted into the exhaust port 138.

(Plug body 126)
The plug body 126 is an annular member and has a center hole 127 formed therein. The plug body 126 contacts the other axial end of the tight material 122 (see FIG. 8). In one example, the outer diameter of the plug body 126 is larger than the inner diameter of the hole 102 in the structure 100. The plug body 126 is arranged to face the outer surface 101 of the hole 102 of the structure 100 (see FIG. 8).

The inner diameter of the center hole 127 is larger than the outer diameter of the tubular portion 132, and the tubular portion 132 is inserted into the center hole 127 of the plug body 126 (see FIG. 8). Therefore, the tubular portion 132 into which the anchor 18 is inserted can be inserted into the center hole 127 of the plug body 126. The length of the tubular portion 132 in the axial direction is longer than the length of the plug body 126 in the axial direction. With the tubular portion 132 inserted into the center hole 127 of the plug body 126, the threaded portion 134 at the end of the tubular portion 132 can be exposed outside the plug body 126.

The plug body 126 is provided with an insertion part 140 into which a hose 20 for injecting grout can be inserted, and an exhaust part 142 into which a hose 22 can be inserted to exhaust air from the hole 102 (see FIG. 9). See C). The insertion portion 140 and the exhaust portion 142 are formed around the center hole 127 of the plug body 126. The insertion portion 140 is a U-shaped notch cut out from the outer circumferential surface of the plug body 126 and has the entire length in the axial direction. Similarly, the exhaust portion 142 is a U-shaped notch cut out from the outer peripheral surface of the plug body 126 and has the entire length in the axial direction. The exhaust section 142 is an example of an exhaust port.

(Tight material 122)
The tight material 122 is a donut-shaped member arranged along the circumferential direction of the anchor 18. As an example, the tight material 122 is a hollow member, and a hole 122A is formed inside along the circumferential direction. Instead of this configuration, the tight material 122 may have a configuration without the hole 122A. The tight material 122 is formed of a member that can be elastically deformed (for example, a rubber-based member, etc.), and can be expanded in width outward in the radial direction (can be expanded in diameter).

The tight material 122 is formed with a penetration part 150 through which the hose 20 passes and a penetration part 152 through which the hose 22 passes (see FIG. 10(B)).

(wing nut 128)
The wing nut 128 includes a cylindrical portion 160 in which a female thread 164 is formed, and a pair of wing portions 162 extending outward from the cylindrical portion 160. The female thread 164 of the wing nut 128 is screwed into the threaded portion 134 of the tubular portion 132, and by screwing the wing nut 128, the contact portion 130 of the insertion plug 124 is pulled back toward the plug body 126. As a result, the distance between the contact portion 130 and the plug body 126 (the distance in the axial direction) is narrowed, and the tight material 122 disposed between the contact portion 130 and the plug body 126 is enlarged (diameter enlarged). (See Figure 8).

(Example of grout filling method)
Next, an example of a grout filling method using the anchor holder 120 will be described.

As shown in FIG. 7, the tubular portion 132 of the insertion plug 124 is inserted into the tight material 122. Anchor 18 is inserted into tubular portion 132 of insertion plug 124 . Further, the hose 20 is inserted into the insertion port 136 of the insertion plug 124, and the hose 22 is inserted into the exhaust port 138 of the insertion plug 124.

Then, the tubular portion 132 of the insertion plug 124 is inserted into the center hole 127 of the plug body 126, the contact portion 130 and the tight material 122 of the insertion plug 124 are placed inside the hole 102 of the structure 100, and the plug body 126 is inserted into the center hole 127 of the plug body 126. It is brought into contact with the outer surface 101 of the body 100 (see FIG. 8). At this time, the hose 20 is inserted through the insertion portion 140 of the plug body 126, and the hose 22 is inserted through the exhaust portion 142 of the plug body 126.

As shown in FIGS. 8 and 10(A) and (B), the female thread 164 of the wing nut 128 is screwed into the threaded portion 134 of the tubular portion 132 of the insertion plug 124, and by screwing the wing nut 128, the insertion plug 124 The contact portion 130 of the plug body 126 is pulled back toward the plug body 126 side. As a result, the tight material 122 between the contact portion 130 and the plug body 126 is expanded and brought into close contact with the inside of the hole wall 103. As a result, the insertion plug 124 is fixed within the hole wall 103 via the tight material 122.

The subsequent step of injecting grout and the step of removing anchor holder 120 after curing the grout for a necessary period are the same as in the first embodiment.

[Action and effect]
In the anchor holder 120, when the tubular portion 132 of the insertion plug 124 is inserted into the tight material 122, the contact portion 130 of the insertion plug 124, the tight material 122, and a portion of the tubular portion 132 are inside the hole 102 of the structure 100. will be placed in Then, the tubular portion 132 is inserted into the center hole 127 of the plug body 126. After that, the wing nut 128 is screwed into the threaded part 134 at the end of the tubular part 132, and the contact part 130 is pulled back toward the plug body 126 by screwing it in, and the tight material 122 is expanded and brought into close contact with the inside of the hole wall 103. . By inserting the anchor 18 into the tubular portion 132, the anchor 18 is centered in the center of the hole 102. Therefore, the anchor 18 can be stably held in the center of the hole 102.

The insertion plug 124 is provided with an insertion port 136 for grout injection and an exhaust port 138 for exhausting air from the hole 102 by injecting grout. The plug body 126 is also provided with an insertion part 140 for grout injection and an exhaust part 142 for exhausting air from the hole 102 by injecting grout. Therefore, by injecting grout into the hole 102 from the hose 20 inserted into the insertion port 136 and the insertion portion 140, the grout injection work can be easily performed.

Furthermore, in the grout filling method, grout can be injected into the hole 102 while the anchor 18 is stably held in the center of the hole 102 of the structure 100 by the anchor holder 120.

<Third embodiment>
Next, the anchor holder and grout filling method of the third embodiment will be described using FIGS. 11 and 12. Note that the same components as those in the first and second embodiments described above are given the same numbers and the explanation thereof will be omitted.

[Overall configuration of anchor holder]
As shown in FIGS. 11, 12(A) and 12(B), the anchor holder 200 includes a tight member 202 as an example of an annular body, and an inserter having a contact portion 220, which will be described later, that contacts one of the tight members 202. It includes a plug 204 and a plug body 206 that contacts the other side of the tight material 202. Further, the anchor holder 200 includes a bolt 218 that is screwed into a screw hole 226 (described later) of the insertion plug 204, and a long nut 216 as an example of a nut that is screwed into the bolt 218. The anchor holder 200 includes a bolt 208 that is screwed into a long nut 216 (on the opposite side of the bolt 218), and a support member 210 that supports the bolt 208. Plug body 206 is an example of a plug. In the third embodiment, there are two bolts 218 and two bolts 208, and two long nuts 216, but the numbers of bolts 218, bolts 208, and long nuts 216 can be changed.

A hole 302 is formed in the structure 300 along the horizontal direction (see FIG. 12). The hole 302 includes an insertion portion 302A having an equal inner diameter in the depth direction.

(Tight material 202)
The tight material 202 is formed of an annular member (for example, a rubber-based member) that can be elastically deformed, and can be expanded in width (can be expanded in diameter). The tight material 202 can be expanded in width and tightly fit into the hole wall 303 of the insertion portion 302A of the hole 302 of the structure 300.

(insertion plug 204)
The insertion plug 204 includes a contact portion 220 disposed inside the hole 302 of the structure 300 and a cylindrical mounting portion 222 integrally formed with the contact portion 220. A mounting portion 222 is provided at the radially inner end of the contact portion 220 . The mounting portion 222 contacts the tight material 202 but does not directly contact the inside of the hole 302. A circular hole 224 is formed in the center of the mounting portion 222 . The inner diameter of the circular hole 224 is larger than the outer diameter of the anchor 212, so that the anchor 212 can be inserted into the circular hole 224 of the mounting portion 222. The contact portion 220 contacts one side of the tight material 202 in the axial direction inside the hole 302 of the structure 300 (see FIG. 12).

The outer diameter of the mounting portion 222 is slightly smaller than the inner diameter of the tight material 202, and the tight material 202 is mounted on the outer peripheral side of the mounting portion 222. The mounting portion 222 has a screw hole 226 formed around the circular hole 224 into which the threaded portion 208A of the bolt 208 is screwed (see FIG. 11).

The mounting portion 222 is provided with an insertion port 228 into which the hose 20 for injecting grout can be inserted, and an exhaust port 230 for exhausting air within the hole 302. The insertion port 228 is an example of an insertion portion. The insertion port 228 and the exhaust port 230 are formed around the circular hole 224 of the mounting portion 222. A hose 22 for exhausting air within the hole 302 is inserted into the exhaust port 230 .

(Plug body 206)
Plug body 206 is an annular member, and has a center hole 236 formed therein through which anchor 212 is inserted. The plug body 206 contacts the other end of the tight material 202 in the axial direction (see FIG. 12). As an example, the outer diameter of the plug body 206 is larger than the inner diameter of the hole 302 of the structure 300, and the plug body 206 is arranged to face the outer surface 301 of the hole 302 of the structure 300 (see FIG. 12). .

A through hole 238 is formed in the plug body 206 around the center hole 236, through which the threaded portion of the bolt 218 passes. Furthermore, the plug body 206 is provided with an insertion port 240 into which the hose 20 for injecting grout can be inserted, and an exhaust port 242 into which the hose 22 can be inserted to exhaust the air in the hole 302 (Fig. 11). The insertion port 240 and the exhaust port 242 are formed around the center hole 236 of the plug body 206. The insertion port 240 is an example of an insertion portion. The plug body 206 is provided with a curved support portion 244 that supports the hose 20 and a curved support portion 246 that supports the hose 22.

(Bolt 218, long nut 216, bolt 208 and support member 210)
As shown in FIGS. 12A and 12B, the threaded portion of the bolt 218 is screwed into the threaded hole 226 of the mounting portion 222 from the insertion plug 204 side. The head of bolt 218 is inserted into a counterbore around threaded hole 226 in insertion plug 204 . The threaded portion of the bolt 218 is inserted into the through hole 238 of the plug body 206. A long nut 216 is screwed into the threaded portion of the bolt 218 on the outside of the hole 302 of the structure 300 .

As shown in FIG. 11, the support member 210 includes a circular hole 250 into which the anchor 212 is inserted, and a hole 252 around the circular hole 250 into which the threaded portion 208A of the bolt 208 is inserted. The support member 210 suppresses displacement of the anchor 212 by inserting the anchor 212 into the circular hole 250, and prevents displacement of the bolt 208 by inserting the threaded portion 208A of the bolt 208 into the hole 252. (See FIGS. 12(A) and 12(B)). A nut 260 is screwed into the threaded portion 208A of the bolt 208, and the nut 260 is brought into contact with the support member 210. Further, the threaded portion 208A of the bolt 208 is screwed into the long nut 216 (on the opposite side to the bolt 218).

Long nut 216 contacts plug body 206. By tightening the long nut 216 that is threaded onto the bolt 218, the mounting portion 222 is pulled back toward the plug body 206. As a result, the distance between the contact portion 220 of the insertion plug 204 and the plug body 206 (the distance in the axial direction) is narrowed, and the diameter of the tight material 202 disposed on the outer circumferential side of the mounting portion 222 is expanded (Fig. 12(B)).

[Action and effect]
In the anchor holder 200, the tight material 202 is attached to the outer peripheral side of the attachment portion 222 of the insertion plug 204, and the threaded portion of the bolt 218 is screwed into the screw hole 226 of the attachment portion 222 of the insertion plug 204. In this state, the mounting portion 222 and the tight material 202 are placed inside the hole 302 of the structure 300. The threaded portion of the bolt 218 is inserted into the through hole 238 of the plug body 206. A long nut 216 is screwed into the threaded portion of the bolt 218. The long nut 216 comes into contact with the plug body 206, and by tightening the long nut 216, the mounting portion 222 is pulled back toward the plug body 206 side. As a result, the distance between the contact portion 220 and the plug body 206 is narrowed, and the tight material 202 is expanded, so that the tight material 202 is brought into close contact with the inside of the hole wall 303 of the insertion portion 302A of the hole 302. By inserting the anchor 212 into the center hole 236 of the plug body 206 and the circular hole 224 of the mounting portion 222, the anchor 212 is centered at the center of the hole 302. Therefore, the anchor 212 can be stably held at the center of the hole 302 of the structure 300.

The plug body 206 is provided with an insertion port 240 for grout injection and an exhaust port 242 for exhausting air from the hole 302 by injecting grout. The insertion plug 204 is also provided with an insertion port 228 for grout injection and an exhaust port 230 for exhausting air from the hole 302 by injecting grout. Therefore, by injecting grout into the hole 302 from the hose 20 inserted into the insertion port 240 and the insertion port 228, the grout injection work can be easily performed.

Further, in the grout filling method of the third embodiment, the anchor 212 is held at the center of the hole 302 of the structure 300 using the anchor holder 200. Grout is injected into the hole 302 from the hose 20 inserted into the plug body 206 and the insertion plug 204 of the anchor holder 200, and the air in the hole 302 is exhausted from the exhaust port 230 and the exhaust port 242. After the grout has hardened, the anchor holder 200 is removed. Therefore, in the grout filling method, grout can be injected into the hole 302 while the anchor 212 is stably held in the center of the hole 302 of the structure 300 by the anchor holder 200.

<Others>
Note that the present invention is not limited to the above embodiments.

In the third embodiment, the tight material 202 is attached to the outer peripheral side of the attachment portion 222 of the insertion plug 204, but the present disclosure is not limited to this configuration. For example, a configuration may be adopted in which a mounting portion integrally formed with the plug body 206 is provided and a tight material is provided on the outer circumferential side of the mounting portion. Further, in the third embodiment, the bolt 208 and the support member 210 are provided, but a configuration without the bolt 208 and the support member 210 may be used.

In the first to third embodiments described above, the hose 22 for air removal is inserted, but the present disclosure is not limited to this configuration. For example, if air removal is possible without the hose 22, there is no need to insert the hose 22 into the anchor holder.

In the grout filling methods of the first to third embodiments, the hoses 20 and 22 are pulled out in response to grout injection, but the present disclosure is not limited to this configuration. For example, the hose may not be pulled out after filling with grout.

In the first to third embodiments described above, the anchor is fixed laterally in the hole of the structure, but the present disclosure is not limited to this configuration. For example, the anchor may be secured downwardly into a hole in the structure, or the anchor may be secured upwardly into a hole in the structure. When the anchor is fixed upwardly in the hole of the structure, a support member may be provided to support the plug of the anchor holder at the edge of the hole of the structure, for example.

Furthermore, the invention may be implemented in various ways without departing from the spirit of the invention. A plurality of embodiments, modifications, etc. can be implemented in combination as appropriate.

10 Anchor holder 12 Grip collar (annular body)
14 Plug 16 Bolt 18 Anchor 20 Hose 22 Hose 30 Holding hole 32 Insertion port 34 Exhaust port 52 Grip collar (annular body)
60 Insertion part 62 Base part 70 Anchor 74 Anchor 102 Hole 103 Hole wall 110 Grout 120 Anchor holder 122 Tight material (annular body)
126 Plug body (plug)
127 Center hole 128 Wing nut (fixing member)
130 Contact portion 132 Tubular portion 134 Threaded portion 136 Insertion port (insertion portion)
138 Exhaust port 140 Insertion part 142 Exhaust part (exhaust port)
200 Anchor holder 202 Tight material (annular body)
206 Plug body (plug)
212 Anchor 216 Long nut (an example of a nut)
218 Bolt 220 Contact part 222 Mounting part 224 Circular hole 226 Screw hole 228 Insertion port (insertion part)
230 Exhaust port 236 Center hole 238 Through hole 240 Insertion port (insertion part)
242 Exhaust port 301 Outer surface 302 Hole 303 Hole wall

Claims (4)

an annular body that expands and contracts and is installed within the hole wall;
The annular body includes a truncated conical insertion part that is pushed into the annular body, and a base part that is integrally formed with the insertion part and faces the edge of the hole. a plug that expands in diameter and is fixed within the hole wall;
a holding hole formed in the center of the plug and centering the inserted anchor in the center of the hole;
an insertion port formed around the holding hole of the plug into which a hose for injecting grout into the hole can be inserted;
an exhaust port formed around the holding hole of the plug to exhaust air in the hole;
Anchor retainer with. an annular body widened and mounted within the hole wall of the hole;
a contact portion disposed inside the hole and in contact with one axial direction of the annular body;
a tubular part formed integrally with the contact part and inserted into the annular body, into which an anchor is inserted, and a threaded part is formed at the end;
a plug that faces the outer surface of the hole, contacts the other axial side of the annular body, and has the tubular portion inserted into the center hole;
a fixing member that is screwed into the threaded portion and, when screwed, pulls the contact portion back toward the plug side and expands the annular body;
an insertion part formed around the tubular part, the contact part and the central part of the plug, into which a hose for injecting grout into the hole can be inserted;
an exhaust port formed around the tubular portion, the contact portion, and the central portion of the plug to exhaust air within the hole;
Anchor retainer with. an annular body that is widened and tightly fits within the hole wall of the hole;
a contact portion disposed inside the hole and in contact with one axial direction of the annular body;
a mounting part that is formed integrally with the contact part and has the annular body mounted on the outer peripheral side, a circular hole in the center into which the anchor is inserted, and a screw hole formed around the circular hole;
a plug that faces the outer surface of the hole, contacts the other axial side of the annular body, and has a center hole formed in the center through which the anchor is inserted;
a bolt that is screwed into the screw hole and inserted into a through hole formed in the plug;
a nut that is screwed onto the bolt on the side of the plug and, when tightened, pulls the mounting part back toward the plug side and expands the diameter of the annular body;
an insertion part formed around the mounting part and the central part of the plug, into which a hose for injecting grout into the hole can be inserted;
an exhaust port formed around the mounting part and the central part of the plug, and exhausting air in the hole;
Anchor holder having. holding an anchor in the center of the hole using the anchor holder according to any one of claims 1 to 3;
Injecting grout into the hole from a hose inserted into the anchor holder and exhausting air in the hole from the exhaust port;
removing the anchor retainer after the grout has hardened;
A grout filling method having.